Pipe-cutting apparatus



A. T. SAMPSON.

PIPE CUTTING APPARATUS.

APPLICATION FILED DECJS, 1919.

1922. 4 SPEETS-SHEET l- Patented Apr. 11

Mill] Imam 4 A/ L am W 2 IIIIIA i jnvenior A. T. SAMPSON.

PIPE CUTTING APPARATUS.

APPLICATIONHLEI) nEc.16. 1919.

Patented Apr. 11, 1922.

4 SHEET$SHEET 2' h Y b In ven'iar s 7:

4 1 a'Z-Z o z'ney A. T. SAMPSON.

PIPE CUTTING APPARATUS. APPLIICATION FILED DEC.I 6, new.

Patented A pl". 1 1, 1922.

4 5 H E ET 3 S.HEET 3:

Z2? veraib? a'zww ezl Patented Apr. 11, 1922.

8 6 m \0 0 .m M 0 89 U... Nmw W wmm DI D A New 8mm T 1% nw Mn N .ABCHIBALD Tfsamrsou, or LYNN, massaonusnrrs, assieNoR To sAMPsoN moms sYsrEi/r, mo, or LYNN, MASSACHUSETTS, acoaroaa'riou,orarassacnnsnr'rs., t w 1 1 '0 all whom it ma'g concern."

Be it known that I, ARGHIBALD TQSAMP- SON, a citizen of the United States, and resident of Lynn, in the county o f Essezr and State of Massachusetts, iave'lnvente'd' an Improvement in Pipe-Cutting Apparatus,

oi' which the following description, in con-' nection with the accompanying drawings, is

a-speciiication', like letters on the drawings representing like parts. 1 I

My present invention relates to cutting apparatus, and more particularly to port able cutting apparatus aaapted to cut a plu: rality oi slots or openings in a metal pipe or conduit. 7

In my various inventions iipon an im proved and novel system ofelectrical con struction and installation, partlyf'explain'ed,

in my copending application, 7 Serial No. 166,813, filed May 7, 1917, one oif-the important features consists'in the method of cutting partially through a metal fpipe or conduit without injury to the electric wires therein, and even When the pipe or conduit is already in place 'in a building or other structure. In the clevelopment o'frmy i111 proved and novel system, above referred to, I have devised apparatus for performing the abovecutting operation, andihave illustrated and claimed such an apparatus in my prior cope'nding application, Serial 190.318,-

036, filed August 16, 1919. Mypresent'in vention relates to the same class of appa present application is capableof ."conjoint use th'erewith.-

" In carrying out' my" invention, I provide means for slinging or hanging the'appara tus rrom pipe-oriconduit, preparatory to clamping such apparatus ina'position on" the pipe or conduit. Clamping means are;pro viued, andas it' is always des1rable, an d sometimes essential, that slotsv be out" in a pipe or conduitlocated in a corner, Ihave arranged the clamping means in such a position relative to the cutting means,that a slot "or slots can be cut in the pipe or con meansfor yieldingly' V of Fig. 1, invention described and claimed m the Ir na-CUTTING arrana'rus.

I Specification of Letters Patent. I 1 Apr, Application fil ed December 16,' 1919. Scria1 No; sea-e84. f

duit so situated. Thepa ir of parallelly ar-,

ranged slots are cut simultaneously, and I provide a pair of rotatable cutters forthis purpose, means being also provided for? ro i rating the cutters continuously or] intermit tentlyj. Furthen'l providemeans for-yield; ingly holding the cutters in cutting position, E the tension of said'means being adjustable.

Except'when the cu'tting operation is tually being performed, {Ifprovide means for moving the cutters outwardly from each other, and from the pipe or conduit. v j

The principal object ofniyanvention therefore, is an improved apparatus for cutting aplurality of parallel slots inv a pipe preventing the cutters from injuringitlie wires or conductors encased in; the pipe or conduit. v

'Still another objectis the provision of" operative position. i V a Otl'er objects and novel feature's of the construction, and arrangement of parts "will appear as-the progresses;

holdingthe -cutters in 1 so description cffthe invention In-the accompanying drawings, FilluZstrating the] preferred embodiment of my in ventio Q t 1 Fig. 1 is-front elevation,

2 is a-planview, a

sition on a pipe, f

of Fig. 2,

Fig. 531s a section, talren on'fithe line 5'5 I ofFig.1, r Fig. 6 is a'section, taken on the line 6mg 3 is a frontelevation, showing-my improved cuttingapparatus mounted1n' po- Fig. an a sectiom takenon'the line Fig, 7 is a-view,"partly in section,ion the,

1f Fig 8; is detail, showing the manner of connecting the-operating handle 5 to the drivings'haft;

' -Fig.- 9 isa sectional view, taken on-the line 9-9 of Fig.8,

ig. lOisa detail-ofthe equalizing means 5i and 15, formed integral therewith, and extending laterally therefrom. These lugs or ears 1 1 and are perforated at 16 and 17 respectively, parallel to the bars 12 and 13. In each of the apertures 16 and 17 are placed shafts or rods 18 and 19, which are held in place by pins 20. These shafts or rods 18 I and 19 extend outwardly on either side of I the lugs or ears let and 15 respectively, and

provide bearings for the clamps 21 and 22 respectively. The clamps 21 and 22 extend upwardly on either side of and substantially parallel to the end member 11. The top of the end member is slotted at 23, in a direction parallel to the bars 12- and 13 and is provided with a perforation 2t at right angles to and in alignment with the lugs or ears 1st and 15. The clamps 21 and 22 are each provided with a perforation in alignment with the perforation 24; in the top of the end member 11. As but one such perforation 25 is illustrated, that in the clamp 22, in Fig. 7, and the clamps 21 and are similar in construction, only such clamp 22 will be referred to in describing such con struction, it being understoodhowever, that such description applies also to clamp 21. The clamp 22 comprises side walls 26 and 27 tied together, top and bottom, by the jaws 28 and web 29 respectively, said jaws and web being joined together by a central web 30, also extending between and uniting the side walls. The side walls extend below the web 29 and are provided with aligg ned holes of approximately the same diameter as the shaft or rod 19, the side walls straddling the lug or ear and preventing sidewise movement of the clamp, The face 3,1 of the jaw '28 bears such a relation to the perforations in the lower end of the side walls 26 and 27 that the cooperating clamps 21 and 22 will hold pipe or conduit of different diameters in predetermined position with respect to the cutting apparatus to be hereinafter described. Further, he length of the face 31 is greater than the length of the face 152 and the angle made by the faces il'i and 152. while shown as slightly less than a right angle, is preferably a right angle. By referring to Fig. 7 it will be noted that the. face 31 is substantially vewticall over the pivot point of the jaw 22, and that movement of the jaw to the right, about its pivot point, will cause a lowering of the face 31, and therefore. a corresponding movement of the face 152. As the movement ofthe jaw 21 is simultaneous with, but in the op-- posite direction to the jaw 22, it will be apparent that the jaws will openor close, to receive larger or smaller pipe or conduit. Also the above described movement of the jaws positions the pipe or conduit, regardless of diameter thereof, in predetermined position with relation to the cutters, and insures that a slot for the pipe will be made by said cutters, the size of the slot being predetermined for each diameter of pipe.

Extending through the perforation 24 and on each side of the upper end of the member 11 is a rod 32, provided on its ends with right and left hand threads 33 and 34 respectively. This rod 32 also passes through a collar 35 which fits intothe slot 23 and is fastened to the rod by a pin 36 to prevent endwise movement of such rod. The per foration 25 is considerably greater in di ameter than the rod 32 to allow free piv-. otal movement of the olamp22 on the hearing rod 19 within desired limits, and the metal of the central web 30 is thickened adjacent such perforation 25, and such thicle ened portion is rounded, as shown at 37 in Fig. 7. A nut 38, one for each threaded end 33 and 34, has its inner face roundcd to conform with the rounded face 37 above dc scribed The intermediate portion of the nut 38 is reduced, as shown, to it between the depending side members ll) and 4.1 of the guide 42, which guide is p'votally mounted between the side plates 26 and 27 by the pin 43. A horizontal member it of the guide 42 bears on the top of the central web 30 adjacent the meeting poinL of the web and the jaws 28. The outer faces of the depending side members 40 and 41 of. the guide 42 are rounded in substantially the same manner as the thickened portion of the central veb 30, and bears against the end of nut A handle 45 is attached at one end of the rod 32 and by means of which said rod may be turned to open or close the jaws 28 of the cooperating clamps 21 and 22.

Theend member 10 is similar to the end i'nember 11, and carries cooperating jaws it; and a7 and operating means therefor. similar in all respects to the jaws 21 and 22 and the operating means just described. In addition, the end member 10 is provided with a pair of lugs or ears 146, formed integral therewith, in which. is pivotally mounted, by means of a pin 147, the book 48, and by means of which the entire apparatus may be suspended ona pipe or conduit, preparatory to adjusting the apparatus in position thereon.

Slidably mounted on the bars 12 and 13 for longitudinal movement is a carriage 19, comprising side members 50 and 51, held together in position on the bars 12 and 13 by a plurality of screws 52. The member 50 is provided with a V-slot 53, to engage with the corresponding V-projection 54 on the bar 12., A gib 55-is placed between the bottom of the bar 12 and the main portion of the member 50. Rotatably T mounted in the member 51is the main driving shaft 56, said Y tatable with the shaft GO paI-allel to the shaft. 56 and mounted in the member 50.

Partially enclosing the gears 58 and'59. are

showninFigz5p r A. frame member 63, having aproj'ecting arm 6- at one end and a projecting arm near the other end, is. provided-with a hollow casing or cover 66 intermediateits ends and in alignment with the casing 62. Said frame member 63 is 'pivotally' mounted on the shaft56'by means of the projecting arms 64 and65, theshaft 56 having a collar 67- formed integral therewith and-engaging in, an annular depression: in the end of the.

frame member 63 adjacent the projecting arm 62t, Wl1il6 a 'screwh68 is provided for retaining the end of the frame member 63 onto the end of theshaft 56. Extending outwardly, or upwa rdly, as viewed in Fig. 1,, from the frame member.

63, is a flange 69 and through which and:

the frame member is rotatably. mounted a shaft 70. This shaft70 liesparallel to the shaft 56 and is reducedat'its endto form a shoulder97 andagainstiwhich-abuts a collar Fat, the shoulder 97 providing- --means 'for spacing thecollar *(tfrom the flange 69,-as

clearly shown inl iga 11. -The cutter 7i slips over the reduced end }:of the shaft :70

and the-:cutter 'Zland collar 74 are clamped, to the shaft .bythe3vasl1er-72 and nut 73.. An angularcircumferential cutis-made inthe ool'larfl, on theside adjacentlthecutter 7 l,.and on this cut away portion is rotatably mounted the .collar;'l51-, the. diameter of which is proportioned to the diameter'ofthe V cutter 71 andflwhich, asclearlyshown in Figs. 1-1 and l2,li1nits the depth of the cut in the pipe or. conduit 136. It willfbe noted,

by a comparison-of Figs. 11 and 12, that the collar 151 cooperatesiwith the cutter 7l -to varythedepth of the 'cutmade, in accord: ance with the variation in the diameter .of

the pipe being .NVOlSkBClUPOILg By this sim ple'expedienul am enabled .to-fuse asingle standard sized mach ne carrying; a-. fixed diameter of cutter tocut slots in pipes of various'diameters to the'required depth for each diameter of pipe, and yet not deep enough to allow the cutter tocome 1n .co'ntao't with, and 1n ure the WIPES or conductors that may be enclosed therein;- Mounted'on the shaft 70, intermediate-the ends' thereof, and

in alignmentwith the gear 58 is a goal-'75,

ofa pitch equal to the pitch ofthe gear 58 hereinafter.

handle 85, by 'mean'sof which the shaft? 8,

and associted parts vmaybe rotated. Also hold the sleeve 88 in adjusted position on 'in Fi O and of any suitable diameter. This gear 75 is partially enclosedby the'c asing 66. The

well as: preventing injury by the gears. to.

the operator. of. the :devlce.

v Extending outwardl p'fromthe arms (let I j and 65'are arms 7 6 and 7 7respectively, these casings 61 and 62respect1vely, as clearly arms 7.61a1id 77 .beingfinialignment and sprockets 7 9 and 80, spacing collars 8 1- and 82 being'placed between the ends/of the,

sprockets 79'and 80' and. the. inside of. the.

arms 76 and 77 respectively. I The sprockets arefastened to theshaft? 8. by pins 8.3. The a function of these sprockets will be explained Attached to the shaft 7'8by the pin 84, and adjacent the sprocket 80, is a mountedjon'the shaft 7 8 and attached there; to bywgthe' pin86, is'a ratchetST; tably mounted on the shaft 78,:betweenthei. ratchet 87 and sprocketTS, isfa-sleeve;.8.8',

having an enlargement. 89 at one end, and a handle. 90 at the other "end. Pivotally mounted 'on the handle 90 is a plate 91 to which is pivotally pawl 92,:engaging withthe ratchet '87 to.

the shaft 78;. A.;radially eXtending; -pi-n. 98

on. the enlargement 89. f th 1 1 88, s gages "with thezslot 94 in a spring 95, which V 1 "10.5, 'SSGand-eXtenc'lS "downwardly, was .viewedin:

s piing partiallyencircles the enlargement Fig; '6 ,.where it is reinforced by the curved 3 plate 96, which; is folded backnpou itself to engage-with"eitheriside of the sp ring95f V The inside curie ofthefplate '96 engages w1tlrframe'63 on the ShaitTO. .[t will be apparentthat rotat on of thesleeve 88.:will

ward the center linefof the-bar 12, as viewed and' .causn1g the cutter TL-toe tlier V i deepen its out, or begheldwith'greater t n-a j sion in 'itsgcut. 1 I

- Pivotallymounted" on the-shaft; 60 is a, frame98, which is practicallyidentical. with the ham-e 63; ,A shaft: 99-1-ota'tably mount ed in projecting arms 100and lOLof the 1% partially encloses Rota gear 103, and co-operates withthe casing tilvto encase the gears 59 130 so 7 I spring. pressed mounted the 100 increase the tensioniof the spring 95, cans ing the ,plate 96 to forcethe Share-7o, and v V int-his manner; cutter 7 land all other parts 7 associated with the shaft, 1 inwardly, or [to-.1

'frame 98, has. rigidly attachedthereto, by-f and 10;, and prevent injury thereto and thereby. The frame 98 has a flange 105 thereon, this flange being similar to the flange 69. on the frame 63. The shaft 99 extends through and beyond the flange 105 and a saw or cutter 109 is held on the shaft by the washer and nut 106 and 107 respectively. A collar 108, similar to the collar 15.1 on the flange 69, performs the same function with regard to the saw or cutter 109 that the collar 151 performs 'ith regard to thesaw or cutter T1. The shaft 99 is provided, intermediate its ends, with a collar 110, similar to the collar 97 on the shaft 70. Springs 111 and 112 located between the side members and 51 and the collars, frames 63 and 98, respectively, tend to force the shafts 99 and 70, and associated parts, outwardly, as viewed in Figs. 5 and 6, thus' moving the saws or cutters 109 and 71outwardly from each other. To further assist the springs 111 and 112 in moving the shafts 99 and T0 outwardly, I may provide a coil spring 113 passing around the members 50 and 51. and having a hook at either end, one hook being attached to the open end of the casing 66 and the other hook to the open end of the casing 101, or any other suitable means to accomplish this function.

On the frame 98, and in alignment with the sprockets 79 and on the "frame 63, are hooks, but one of which, 114:, that in alignment with the sprocket 80, is shown. (See Fig. 2). A sprocket chain 115 is fastoned, one end tothe hook 11 1 and the other endtothe sprocket 80 while a similar sprocket chain 116 is attached, one end to the sprocket T9 and the ot-he end to a hook corresponding to the hook 111. It is evident that by operating the handle 85, the frames carrying'the saws or cutters 71 and 109 are rotated to bring said cutters closer together, while by operating the handle 90, the tension of the spring 95 may be varied according to the pressure it is desired to put onthe cutters 71 and 109.

Rotatably mounted in suitable bearings in the end members 10 and 11 and lying parallel to the bars 12 and 13, is a feed screw 117, which extends beyond the end member 11 and is provided with a handle 118, by means of which it'may be rotated. This feed screw 11'? engages with a female hreaded portion 119 in the member 50, and suitable means, as collars 120 and 121 on the feed screw, preventing end movement thereof, rotation of the feed screw causes a corresponding movementcfthe side members 50 and 51, and all parts caried thereby, along the bars 12 and 13.

Rotary motion is imparted to the cutters 71 and 109 by the gears 7 5 and 103 from the shaft 56, one end of which extends outward from the side members 50 and 51, as

end of the shaft 56 is provided with a cir cumferential groove 122. Over the extended end fits a sleeve 123, having fastened thereto, intermediate its ends, a ratchet 12 1.

The sleeve 123 is keyed on the shaft 56 and a boss 125 is rotatable on the sleeve 12%, being prevented from end movement on said sleeve by the ratchet 12st and an an nular extension 126 on the end of the shaft. Rotatably mounted on theboss 125, by a screw 127, is a pawl 128, which is held in spring engagement with the ratchet 12 1. by a spring 129, riveted or otherwise secured to the boss 125. The outer end of the boss 125; is provided with a dove-tailed slot 11-30 in which may slide the dove-tailed end 131 of the operating arm 132. The end of the arm is slotted at 133 and the end of thisslot is enlarged at 13st to provide a circular hole of a diameter slightly greater than the diameter of the shaft 56. The width of the slot 13-3 is-slightly greater than the diameter of the bottom of the circumferential groove 122. The arm 132 is provided with a handle 134 by means of which it is operated. To.

assemble the operating means for the shaft 56, the sleeve 123 is slipped over the extended end of the shaft 56, the arm 132 being at this time in the dovetailed slot 130,

with the circular enlargement 13 1- in alignment with the shaft. Vl hen' the sleeve has been pushed onto the shaft 56 until the groove 122 is in alignment with the arm 132, said arm is forced to the right, as viewed in Figs. 1, 8 and 9, until the slot 133 engages the groove 122. When this occurs, a bolt 135, passing through the slot 133 and into the boss 125, is utilized to hold the arm v132 in position. lV'ththis construction, I am enabled to' rotate the shaft continuously by a rotary motion of the arm 132, or, and which extremely important where it is necessary to operate the device in a. restricted space, as in a corner, I am enabled to rotate the shaft 56 intermittently by an oscillating motion of the arm 132. Figs, 11 and '12 illustrate the position 0 the cutters 71 or 109 when cutting slots in the smallest and largest pipes or conduits, respectively, that the device is capable of operating upon without adjustment. It will be noted that the angle made with a perpendicular diameter, as viewed in Figs. 11 and 12, by a line extending from the center of the pipe to the point where the cutter breaks through the inner surface of the pipe is constant, regardless of the diameter of the pipe, and that therefore, the width between slots is the same regardless of the diameter of the pipe. As hereinbefore mentioned, I attain this result by properly proportioning the angle the face 31 of 1 4125220 j a Y the clamp makes with the perpendicular drawn through the pivot point of'such clamp. i 3 w 3 .The operation ofiiiy invention'is as follows, it being assumed that it is desired to cut a pair of parallel slots ina pipe136, in

a manner similar to that described in my copendmg application Serial No. 166,813,

above referred to, andthat such pipe is arranged in a corner, that is, inthe angle.

formed by the meeting of the ceiling and'a wvall of a building; The entireapparatusis hung on the pipe or conduit 136 by the hook 4S and the'handles utilized to open the jaws 28 of the clamps sufficiently to span the pipe. Also, the handleQO is operated to reduce the tension in the spring 95 and allow the springs 111,112 and 113 to swing' the frames 6 3 and 98 on theiraxes to separate the cutters 'iland:109.""The" entire mechanism. is swung on the pin 47 .as a

pivotand into the position shown in Fig. 3, where the handles 15 are. operated to se curely attach the device-tothe pipe 136 by means of the clamps, above describer. This clamping operation automatically positions the cutting'apparatus with respect to the pipe; so that the'properlwi'dth between slots and the proper depth of slots 'will be automatically determined for the-diameter of the pipe, .regardless of what. suchdiameter may be. Assuming now that the device has been properly positioned on the pipe", the handle118 is used to rotate, the feed screw 117 to move the side members 50 and 51- and all parts carried thereby, to bring the cut ters 71 and 109 into position to start the out.v :H'andle 85 is now *operate-d to rotate the sprockets 79 and 90 to draw the shafts-70 and 99 and thus the cutters "('1 and 109 toward each other against the tcnsiongoi the springslll. 112, and 113, the cutters by this movement being brought into engagement withithe' pipe The handle 90 '18 now operated to properly tension the spring 95 and yieldingly hold the cutters 71 and1109 against'the pipeythe proper-tension being respectively, is intermittent.

maintained. byithe engagement of-the ratchet 8'7,l)v..the pawl 92:1The shaft-561 is :now'

rotated by means of the farm132, and it by means ot the gears 58. and 59. 103 7 Only the arm 132is operated until the cutters 71 and 109 have cut to such adepththat the collars 74 and 108 engage with thepipe, thus limit ing thedepth of cut, when theuhandle 118 is rotated simultaneously with'th e opcravtion of the arm 132, to feed the cutters 71 and 109 along the pipe 136 and form the slots. After the proper lengthcf slot has been cut, "the tensiorris removed from the spring 95,'when the springs. 11-1., 112 and 113 back the cutters 71'and109 out of the slots, 7 and the handles operated-to release the mech- .nisrnfrom the pipe: s ,1

While. g1 have necessarily described the preferred embodiment of my invention somewhat in detail, it is to beunderstood that I may vary the size, shape. and arrangement of parts Within considerably wide limits without departing from the spirit of the invention; fl Fromthe above description it will be ap: parent that. my improvedi cutting ;appa; ratus may lbe used to cut'a'slot longitudinally of a 'pipeg'or a plurality of suclrslots 7 simultaneously an-dthatwhen used to'cut a plurality of slots, the'space between said slotsfwillvary in distance according to the diameter of the pipe operatedon,. this dis tanc'e being predetermined. -Again, the

length"of""slot#cut"is predetermined.abso

dnay result tothe cutters, the apparatus may be successfully and efiiciently operated by unskilled labor. 5 fiHaving thus described my invention, .what I claim as new and desire to secure by Letters Patent, is v 1. A mach-ine-of the class described adapt 2 ed for forming parallel cutssimultancously ha ing.,:in combination, a;guideway.i sup? porting means at each'end of' said guideway, a support on saidguideway,means io'r-movin; .the support to and ;fro:on the guideway a; pivotally mounted cutters rotatably' mounted "in said i'fran'ief and means for intermittently and 'continu- -11 ously rotating s aid cutters. p

' .24. A machine-of the class described adaptdid for forming, parallel cuts simultaneously having; in. combination a guidewayn; sup-- 'portingfmeans at each'e'nd of said guide- .way, a support on; said guideway. .IHCHDS {for 1 moving the support to and fro on; the guidewayfa. pair of framcs pivotally mounted, one oneach sidc'o'f thesupport'and- 'niov able toward and from eachiother a cutter for each .frame rotatably mounted thereon; and means normally tending to separate said frames and associated cutters.

3. A machine of the class described adapted for-forming parallel cuts simultaneously having, in combination a guideway, supporting means at each end of said guideway, a support on said guideway, meansv formov- 1-05 ,frame onthe support 1 of the support, a frame on each side of the support and pivotally mounted on the parallelly arranged shafts, a shaft rotatably mounted in each frame and parallelly arranged with respectto each other and with the first said parallelly arranged shafts, a cutter mounted on each of the shafts in the frame, and means for rotating said cutters at the same speed and in opposite directions. 5. A ma chine of the class described adapt ed for forming parallel cuts simultaneously having, in. combination, a support, a frame pivotally mounted thereon, a shaft rotatably mounted in the frame, a cutter mounted on the end of said shaft, means normally tending to rotate said frame on its pivotal mounting to move the cutter away from the support and the work, a second shaft mountec in said frame parallel to the first shaft, and means carried by the second shaft and engaging with the first shaft to yieldingly force said frame and cutter toward the support and the work. i

6. A clamp to secure a cutting apparatus 7 to a pipe comprising, a body member, clamps,

pivotally mounted one at each side of the lower end of the body member, a clamp screw rotatably mounted at the upper end of the body member and extending through each clamp, a nut on each clamp associated with the clamp screws for providing a straight pull in any angular position of the clamp,

and means for rotating said clamp screws.

'Z. A machine of the class described adapted for forming parallel cuts simultaneously having, in combination. a guideway, support ing means at each end'of said guidcway, a support on said guideway, means for moving the support to and fro on the guidcway. a

pirotallymounted frame on each side of the support, a eutter rotatably mounted in each support. gears for transmitting power to rotate the cutters, and casings associated with each frame for enclosing said and preventing injury thereto and thereby.

8. A clamp to secure a cutting apparatus to a pipe comprising, a body member, clamps pivotally mounted, one at each side of the lower end of the body member, a clamp screw rotatably mounted at the upper end of the body member and extending through each clamp, a nut on each clamp associated with. the clamp screws, an angular member pivotally mounted in the clamp and engaging, one arm with the clamp and the other arm with the nut, whereby a relative movement of the clamp and screw is pro vided.

9. n machine of the class described adapted for forming parallel cuts simultaneously having, in combination, a pair of cutters, means associated therewith for limiting the depth of cut in accordance with the diameter of the pipe worked on, and clamping jaws cooperating with said means to position pipes of various diameters in proper relation with the cutters.

10. A machine of theclass described adapted for forming parallel cuts simultaneously having, incombination, a pair of cutters, means associated. therewith for lim iting the depth of cut in accordance with the diameter of the pipe. worked on, and means for positioning pipes of various diameters to out therefrom a sect-ion of prede termined size,

11. .A machine of the class described adapted for forming parallel cuts simultaneously having, in'combination, a pair of cutters, means associated-therewith for varying the depth of cut made in accordance with the diameter of the pipe being worked upon;

12. A machine of the class described adapted for forming parallel cutssimul taneously having, in combination, a pair of means associated with the cutter for-vary-' ing the depth of cut in accordance with the diameter of pipe being worked upon.

14;. In a machine of the class described, the combination of a frame, a cutter mounted thereon, clamping Laws for positioning said frames on pipes of various diameters in predetermined relation with the cutter, and meansassociated with the cutter and engaging wtli the outside of the pipe to vary the depth of cut inaccordance with the diameter of pipe being worked upon.

In testimony whereof,I have signed my name to this specification, in the presence of two subscribing witnesses.

ARGHIBALD T. SAMPSON.

Witnesses:

JAMES R. Honour, HAROLD J. CLARK; 

